36 | Replacing the Thermal-Cooling AssemblyReplacing the Thermal-Cooling AssemblyWARNING: Before working inside your computer, read the safety informationthat shipped with your computer and follow the steps in "Before Working InsideYour Computer" on page 7. After working inside your computer, follow theinstructions in "After Working Inside Your Computer" on page 9.For more safety best practices, see the Regulatory Compliance home page atdell.com/regulatory_compliance.ProcedureNOTE: The original thermal grease can be reused, if the original system boardand thermal-cooling assembly are reinstalled together. If either the system boardor the thermal-cooling assembly is replaced, use the thermal pad provided in thekit to make sure that thermal conductivity is achieved.1 Align the screws on the thermal-cooling assembly with the screw holes on thesystem board.2 In sequential order (indicated on the thermal-cooling assembly), tighten the captivescrews that secure the thermal-cooling assembly to the system board.3 Connect the fan cable to the system board.Postrequisites1 Replace the bottom cover. See"Replacing the Bottom Cover" on page 28.2 Replace the keyboard. See "Replacing the Keyboard" on page 24.3 Replace the wireless card. See "Replacing the Wireless Card" on page 20.4 Replace the hard drive. See "Replacing the Hard Drive" on page 18.5 Replace the battery. See "Replacing the Battery" on page 13.6 Replace the base cover. See "Replacing the Base Cover" on page 11.